start feco5 # Fe(CO)5 ... there are two symmetry distinct types of CO molecules geometry units au symmetry group d3h fe 0.0 0.0 0.0 c 0.0 0.0 3.414358 o 0.0 0.0 5.591323 c 2.4417087 2.4417087 0.0 o 3.9810552 3.9810552 0.0 end basis fe library 3-21g o library 3-21g c library 3-21g end basis "cd basis" o library "DGauss A1 DFT Coulomb Fitting" c library "DGauss A1 DFT Coulomb Fitting" fe library "DGauss A1 DFT Coulomb Fitting" end dft xc becke88 lyp end task dft